Hugh Binning, Works, p. 223:
“If we being evil, know how to give good things to our children, how much more shall our heavenly Father give his Spirit to them that ask him?” Alas, that we should want such a gift for not asking it! My beloved, let us enlarge our desires for this Spirit, and seek more earnestly; and no doubt affection and importunity will not be sent away empty. Is it any wonder we receive not, because we ask not, or we ask so coldly, that we teach him in a manner to deny us: qui timide rogat [he who asks timidly], I may say, frigide [coldly], docet negare [teaches to refuse]. Ask frequently, and ask confidently, and his heart cannot deny. O that we could lay this engagement on our own hearts to be more in prayer! Let us press ourselves to this, and we need not press him. Albeit the first grace be wholly a surprisal, yet certainly he keeps this suitable method in the enlargements of grace, that when he gives more, he enlargeth the heart more after it, he openeth the mouth wider to ask and receive, and, according to that capacity, so is his hand open to fill the heart. O, why are our hearts shut when his hand is open!
Source: https://www.puritanboard.com/threads/ask-and-his-heart-cannot-deny.89300/, Comment 1